Finally after several tries I can ditch SuperDuper for the ISboxer 1024 char's extended macro's
One thing I never did was to log out and back in for it to work? (can't remember I ever read that in the Macro sections)

So, when I create or adjust a macro in ISboxer I have to log out en back in to get it to work.
But I am happy now, I have Mercurio's 2 step working now and have a major boost in DPS!